CN1652918A - Metering device for an injection molding unit - Google Patents
Metering device for an injection molding unit Download PDFInfo
- Publication number
- CN1652918A CN1652918A CNA03810556XA CN03810556A CN1652918A CN 1652918 A CN1652918 A CN 1652918A CN A03810556X A CNA03810556X A CN A03810556XA CN 03810556 A CN03810556 A CN 03810556A CN 1652918 A CN1652918 A CN 1652918A
- Authority
- CN
- China
- Prior art keywords
- injection
- dosing mechanism
- chamber
- channel
- dosage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001746 injection moulding Methods 0.000 title claims abstract description 15
- 238000002347 injection Methods 0.000 claims abstract description 46
- 239000007924 injection Substances 0.000 claims abstract description 46
- 238000006073 displacement reaction Methods 0.000 claims abstract description 19
- 229920003023 plastic Polymers 0.000 claims abstract description 14
- 239000004033 plastic Substances 0.000 claims abstract description 14
- 238000007789 sealing Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 abstract description 9
- 238000004512 die casting Methods 0.000 description 6
- 239000007921 spray Substances 0.000 description 6
- 230000033001 locomotion Effects 0.000 description 4
- 230000004087 circulation Effects 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/461—Injection of measured doses
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
- B29C45/28—Closure devices therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/53—Means for plasticising or homogenising the moulding material or forcing it into the mould using injection ram or piston
- B29C45/54—Means for plasticising or homogenising the moulding material or forcing it into the mould using injection ram or piston and plasticising screw
- B29C45/542—Means for plasticising or homogenising the moulding material or forcing it into the mould using injection ram or piston and plasticising screw using an accumulator between plasticising and injection unit, e.g. for a continuously operating plasticising screw
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/56—Means for plasticising or homogenising the moulding material or forcing it into the mould using mould parts movable during or after injection, e.g. injection-compression moulding
- B29C45/561—Injection-compression moulding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2017/00—Carriers for sound or information
- B29L2017/001—Carriers of records containing fine grooves or impressions, e.g. disc records for needle playback, cylinder records
- B29L2017/003—Records or discs
- B29L2017/005—CD''s, DVD''s
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention relates to a dosing device for exactly proportioning the amount of plastic to be injected in order to produce plastic articles using an injection molding unit. The dosing device comprises a pre-chamber (20) and a dosing chamber (40) that are connected to one another by means of a connecting channel (30). A movable displacement element (50) is arranged between the pre-chamber (20) and the dosing chamber (40). The pre-chamber (20) and the dosing chamber (40) communicate with one another during a dosing phase by means of the connecting channel (30). The dosing chamber (40) is filled with plastic material, wherein the displacement element (50) is moved against a stop (74) and an injection channel (70) is then closed. During an injection phase, the connecting channel (30) is closed, the injection channel (70) is open and plastic material is injected into the pre-chamber (20) via a hot channel (10). The displacement element (50) moves against the stop (42) and an exactly defined amount of plastic material that is determined by volume V of the dosing chamber is then injected.
Description
Technical field
The present invention relates to a kind of dosing mechanism as claimed in claim 1 that is used for injection molding unit.
Background technology
Always require as far as possible accurately to determine that for plastic injection-moulded each circulation (injections) is expelled to the amount of plastic (emitted dose) of mold cavity the inside and can repeats to be consistent when a large amount of injection.This point is particularly important for data card such as bank card or so-called smart card or data medium such as CD, DVD etc., because for the essential error that keeps very narrow (strictness) of these products.Produce serious problem when the die casting of multi-imprssion mould tool so-called, wherein plastic material is injected in the die cavity that amplifies corresponding to a die casting stroke and then die casting.At this, before die casting, must there be accurate emitted dose, because die cavity closed injection passage in die casting saves removal casting nozzle then thus in each die cavity the inside.
On the other hand, owing to disturb, in the passage of heat distributor of different die cavities,, other inexactness in mismachining tolerance or the system changes owing to making emitted dose as the thermal balance of adjustment point, various flows dynamic resistance.Because injection moulding process is subjected to refluxing by influencing with similar mechanical property in injection screw, often can not satisfy its emitted dose precision.
Summary of the invention
Therefore the present invention proposes a kind of dosing mechanism, is that each the injection accurately determined the plastics injection volume before injection moulding by it.A feature that comprises claim 1 according to dosing mechanism of the present invention; Dependent claims is a favourable expansion structure of the present invention.
According to the present invention, described dosing mechanism comprises a dosage chamber and a cup, they interconnect by an interface channel that can end and by one movably displacement elements be spaced from each other.Before each spraying cycle, plastic material is imported the dosage chamber by interface channel from cup, wherein, described displacement elements moves to a given position, and the accurate volume of dosage chamber is determined in this position.Then interface channel is ended, and by the plastic material importing cup of an injection channel with plasticizing.Make displacement elements move to one second given position thus, and make an accurate given volume clamp-on an injection canal from the dosage chamber thus.
Make the injection moulding volume always identical by frame for movement, and can end under pressure by supercharging, and spray prestress in the same manner or compression from being ejected into thus, this produces active influence to accuracy of spray again.
Described displacement elements is a piston preferably, and the piston area that wherein limits cup is less than the piston area that limits the dosage chamber.In this embodiment, the injection pressure of not only passing through an injection molding unit on the injection moulding direction realizes motion.The motion on (dosage direction) in the opposite direction of this piston when opening wide interface channel by different area than and the supercharging or the stagnation pressure that are produced realize that wherein two motions are defined on both direction.
A locking device realization is preferably passed through in opening wide and closing of described interface channel and injection canal, wherein, open wide and injection channel is closed at the described interface channel in a position (dosage position) of locking device, close and injection canal opens wide at the described interface channel of the second place (injection position).This locking device also can constitute like this, makes that two passages all open wide on a centre position of locking device.
Preferably be provided with an adjustable backstop that is used for displacement elements, make the volume of dosage chamber can correspondingly adapt to demand.
By can when keeping very narrow product error, guaranteeing the high product precision according to dosing mechanism of the present invention.At this, multi-cavity mold and a singe cavity mold (on performance) performance are similar.This dosing mechanism can be used as the mould valve nozzles of replacement passage of heat nozzle or the machine valve nozzles of the accurate injection weight of conduct.
Description of drawings
Describe one embodiment of the present of invention in detail by means of accompanying drawing below, the accompanying drawing letter illustrates a local side view that disconnects of described dosing mechanism.
The specific embodiment
Be provided with an injection channel 10 in a matrix 100, it is made of the passage of heat and with an injection molding unit, promptly an injection screw unit or an injection moulding cylinder body are connected.Described injection channel 10 feeds an annular cup 20, and itself is connected with dosage chamber 40 by an overflow ducts 30.This dosage chamber 40 is in an injection canal 70 and is connected, and this passage itself feeds a mold cavity 90.
Between described cup 20 and dosage chamber 40, be provided with the movably displacement elements 50 of an annular piston form.This displacement elements 50 can move between the primary importance and the second place, leans on a backstop 74 at this displacement elements of primary importance, and it leans on second backstop 42 in the second place.Described backstop 74 is parts of dosage stroke-adjustment piston 80, and in order to adjust the dosage stroke, this adjustment position of piston can change, as represented by arrow 72.
In addition, described dosing mechanism comprises a locking device 60, and it extends in dosage chamber and the injection canal 70 as the longitudinal axis of handle bar 66 by dosing mechanism since an operating element 68 always.In this end, this device has a closed head, and it has a stop surface 64 and is used to seal overflow ducts 30 and one and is used for closed injection passage 70 by pin 62.
Limit the piston area A of cup 20
1Less than the piston area A that limits dosage chamber 40
2This outer piston 50 is connected with a piston rod 52, and it has the handle bar 66 of a bigger diameter as locking device in cup 20 zones.Guarantee thus, in the centre position area A
1Also less than area A
2
Locking device in the accompanying drawings is positioned at the injection moulding position, in 30 sealings of this position overflow ducts and injection canal 70 opens wide.Lean on backstop 74 at this displacement elements, and dosage chamber 40 is full of by plastic material fully.In this case, plastic material is carried by the injection channel 10 of injection molding unit.Because overflow ducts 30 sealings, injection pressure affacts less piston area A
1Upward and towards backstop 42 move displacement elements, make the volume V that just in time is positioned at the displacement elements front thus
2Injected.Follow described locking device and enter the dosage position, at this position needle-valve (Nadelverschluss) closed injection passage 70 and and then open wide overflow ducts 30 at first.For example carry out simultaneously press casting procedure.
In the dosage position, cup 20 is interconnected with dosage chamber 40, wherein has identical pressure, supercharging or stagnation pressure in two chambers.Because different area A
1, A
2Produce an active force, it makes displacement elements 50 move to backstop 74, is full of fully up to dosage chamber 40.Enter a die casting position at this mould (not shown), needle-valve opens wide, and wherein at first seals overflow ducts 30 and opens injection canal 70 then, and begin a new circulation.
According to dosing mechanism of the present invention multi-cavity mold is normally moved by using, because can not produce overspray, even die cavity is by a multiple die forming by the emitted dose of given each die cavity.Because in area A
1And A
2Between exist small area difference just enough, so 50 of displacement elements are produced small load and only cause small leakage thus.
Described dosing mechanism can be very near the mold cavity setting, make and between dosing mechanism and mold cavity, only produce small material compression influence, and use dosing mechanism can not cause bigger change, so the course of work and a mould valve nozzles are duplicate to injection machine.
Overflow ducts and needle-valve are ended dividually, make to produce a supercharging by overflow ducts when needed.Because the size of emitted dose determines to realize by dosing mechanism, for spray screw rod can abandon one in most of the cases the backflow in plasticizing end, therefore save relevant therewith problem as wearing and tearing, the vibration of injection weight and similar problem.
The injection weight of each die cavity can be adjusted by dosage stroke adjustment piston 80 on the principle, therefore can adjust very different emitted doses.
If described dosing mechanism uses as valve nozzles in mould, only need an injection weight to regulate to each die cavity, because product weight is determined by mold cavity.
In addition, for example can be by an injection screw rod or big dosage stroke of an injection cylinder body plasticizing, it can be used for a plurality of circulations.
If described dosing mechanism uses as a valve nozzles in mould, then in cup 20 1 sides a high expulsion pressure had just appearred before needle-valve opens wide.If needle-valve is then opened wide, then produce an impact type and spray, because the expulsion pressure that is produced works as same holder.Therefore remove in order to begin to spray by the drag losses of injection channel to dosing mechanism.Can realize very short injecting time by the impact type injection.Spray the advantage that also additionally has the technology aspect by impact type.
As mentioned above, especially also be applicable to mould according to dosing mechanism of the present invention with a plurality of die cavities.For this mould, the injection channel that plasticizing apparatus is ejected into wherein is branched off into a plurality of injection channels, and they feed a mold cavity respectively.Be preferably in the injection channel of each branch and be provided with a dosing mechanism, make each mold cavity have self a dosing mechanism along branch.At this, described dosing mechanism makes injection channel 70 feed mold cavity 90 preferably near the mold cavity setting.
For the mould that only has a die cavity, described dosing mechanism is preferably also near the die cavity setting.But on the other hand also can, dosing mechanism is arranged on the desired position between plasticizing apparatus and the mold cavity.
Claims (9)
1. dosing mechanism that is used for injection molding unit, have a cup (20) that is connected with an injection channel (10) and a dosage chamber (40) that is connected with an injection canal (70), wherein, described cup (20) and dosage chamber (40) interconnect by an interface channel that can end (30), this dosing mechanism also has a movably displacement elements (50), and it is separated from each other cup and dosage chamber.
2. dosing mechanism as claimed in claim 1 is characterized in that, described displacement elements (50) is a piston mobile.
3. dosing mechanism as claimed in claim 2 is characterized in that, limits the piston area (A of cup
1) less than the piston area (A that limits the dosage chamber
2).
4. as each described dosing mechanism in the claim 1 to 3, it is characterized in that, a locking device (60) is arranged, it has first stopper (62) and second stopper (64) that is used to seal interface channel (30) that are used for the closed injection passage, wherein said locking device can move between a dosage position and an eject position, interface channel (30) opens wide by the sealing of first stopper at dosage position injection canal (70), and injection canal (70) opens wide by second stopper (64) sealing at the eject position interface channel.
5. dosing mechanism as claimed in claim 4 is characterized in that, described locking device can move on the pressurization position, all opens wide at this position interface channel and injection channel.
6. as each described dosing mechanism in the claim 1 to 5, has an adjustable backstop (74) that is used for displacement elements (50).
7. injection molding unit, it has one as each described dosing mechanism in the claim 1 to 5.
8. mould that is used to make plastic products, it has at least one as each described dosing mechanism in the claim 1 to 5.
9. mould as claimed in claim 8, it has a plurality of die cavities, wherein each die cavity is equipped with self a dosing mechanism.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10221535A DE10221535C1 (en) | 2002-05-15 | 2002-05-15 | Dosing unit for injection molding machine comprises pre-dosing chamber connected to feed channel and separated from dosing chamber by piston, with chambers connected by a sealable channel |
| DE10221535.9 | 2002-05-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1652918A true CN1652918A (en) | 2005-08-10 |
Family
ID=7714539
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA03810556XA Pending CN1652918A (en) | 2002-05-15 | 2003-05-06 | Metering device for an injection molding unit |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US7014454B2 (en) |
| EP (1) | EP1506078B1 (en) |
| JP (1) | JP2005529765A (en) |
| CN (1) | CN1652918A (en) |
| AT (1) | ATE321641T1 (en) |
| DE (2) | DE10221535C1 (en) |
| TW (1) | TWI260265B (en) |
| WO (1) | WO2003097325A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103496103A (en) * | 2013-09-27 | 2014-01-08 | 苏州好特斯模具有限公司 | Hot runner system for injection moulding |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7156634B2 (en) * | 2004-06-30 | 2007-01-02 | Husky Injection Molding Systems Ltd. | Injection molding machine spigotted shooting pot piston |
| EP1844916B1 (en) * | 2006-04-12 | 2014-06-25 | ENGEL AUSTRIA GmbH | Device for expansion injection moulding |
| DE102009022238A1 (en) | 2009-05-20 | 2010-11-25 | Kraussmaffei Technologies Gmbh | Process for the production of plastic molded parts with an integrated conductor track |
| WO2012063937A1 (en) * | 2010-11-11 | 2012-05-18 | 株式会社Ihi | Blanket installation method |
| CA2918106A1 (en) * | 2011-01-28 | 2012-08-02 | Husky Injection Molding Systems Ltd | Plasticizing system including opposite-facing surfaces for contacting opposite sides of solidified-resin particle |
| DK2686150T3 (en) * | 2011-03-12 | 2017-02-20 | Husky Injection Molding Systems Ltd | Plastic and injection device |
| JP5880166B2 (en) * | 2012-03-13 | 2016-03-08 | 株式会社Ihi | Blanket installation method and blanket unit |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3160331A (en) | 1961-09-22 | 1964-12-08 | Pyles Ind Inc | Material dispensing device including a metering chamber |
| CH461789A (en) * | 1963-12-07 | 1968-08-31 | Owens Illinois Inc | Process for the production of objects from thermoplastic material and device for carrying out the process |
| FR1428521A (en) | 1964-11-27 | 1966-02-18 | Hydroplast | Improvements in injection-transfer molding |
| US3390433A (en) * | 1966-02-01 | 1968-07-02 | Vistron Corp | Metering manifold for molding |
| US3841813A (en) * | 1972-10-06 | 1974-10-15 | Tempcraft Tool & Mold | Wax injection nozzle with relief reservoir |
-
2002
- 2002-05-15 DE DE10221535A patent/DE10221535C1/en not_active Expired - Fee Related
-
2003
- 2003-04-11 TW TW092108364A patent/TWI260265B/en not_active IP Right Cessation
- 2003-05-06 JP JP2004504701A patent/JP2005529765A/en active Pending
- 2003-05-06 CN CNA03810556XA patent/CN1652918A/en active Pending
- 2003-05-06 EP EP03725150A patent/EP1506078B1/en not_active Expired - Lifetime
- 2003-05-06 WO PCT/EP2003/004687 patent/WO2003097325A1/en active IP Right Grant
- 2003-05-06 DE DE50302819T patent/DE50302819D1/en not_active Expired - Fee Related
- 2003-05-06 AT AT03725150T patent/ATE321641T1/en not_active IP Right Cessation
-
2004
- 2004-11-09 US US10/984,078 patent/US7014454B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103496103A (en) * | 2013-09-27 | 2014-01-08 | 苏州好特斯模具有限公司 | Hot runner system for injection moulding |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1506078B1 (en) | 2006-03-29 |
| US20050053692A1 (en) | 2005-03-10 |
| TW200307598A (en) | 2003-12-16 |
| WO2003097325A1 (en) | 2003-11-27 |
| TWI260265B (en) | 2006-08-21 |
| EP1506078A1 (en) | 2005-02-16 |
| US7014454B2 (en) | 2006-03-21 |
| DE10221535C1 (en) | 2003-08-07 |
| ATE321641T1 (en) | 2006-04-15 |
| JP2005529765A (en) | 2005-10-06 |
| DE50302819D1 (en) | 2006-05-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |